Water-heating attachment for hot-air furnaces



(No Model.) 3'Sheets-Sheet 1.

J. E. WHITE. WATER HEATING ATTACHMENT FOR HOT AIR FURNACES. No. 498,946. Patented June 6, 1893.

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J. 13. WHITE. WATER HEATING ATTACHMENT FOR HOT AIR FURNACES. No. 498,946. Patented June 6, 1893.

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J. E. WHITE. WATER HEATING ATTACHMENT FOR HOT AIR FURNACES.

No. 498,946. Patented June 6, 1893.

UNITED STATES PATENT OFFICE.

JAMES E. WHITE, OF MANSFIELD, MASSACHUSETTS.

WATER -HEATING ATTACHMENT FO'R HOT-AIR FURNACES.

SPECIFICATION forming part of Letters Patent No. 498,946, dated June 6, 1893.

Application filed March 3, 1893.

. ments for Hot-Air Furnaces, of which the folthe kind commonly known as the Chilson.

lowing is a specification, reference being had to the accompanying drawings, which form a part hereof.

My invention relates to a hot-air furnace of cone furnace, and the object of my invention is to combine with such a furnace a waterheating attachment .by which heat may be distributed to portions of the building which are not easily heated by the hot air alone, but without detracting from the hot-air heating capacity of the furnace.

My invention consists in a hot-air furnace having a fire-pot with a series of pockets in the upper part of its inner periphery in combination with an annular water-chambersomewhat oval in vertical cross-section, tapering toward the top and toward the bottom, and having lugs by which the water-chamber is supported by the rim of the fire-pot out of contact with the fuel, and a series of connecting pipes leading from the annular waterchamber to a second water-chamber whence the hot water is conducted to the radiators, the pockets in the rim of the fire-pot allowing free passage of the heated gases so that the annular water-chamber and its connecting pipes are exposed to direct heat on all sides.

In the drawings, Figure 1 is a longitudinal section of a Ohilson cone furnace with my water-heating device attached. Fig. 2 is a cross-section. Fig. 3 is a top view of the firepot. Fig. 4 is a top view of the annular waterchamber detached, and Fig. 5 is a bottom View of the same.

In the furnace itself which is too well known to require detailed description, A is the easing and B are the cone sections which carry the products of combustion from the combustion chamberB' to the annular pipe 0 whence they pass 01f through pipe 0 to the chimney. The heated air in the space D between the furnace and easing passes to the registers (not shown in the drawings) through pipes leading from the furnace at D.

Serial No. 464,564. (N6 model.)

E represents the feed-door, F the fire-pot and F the ash-pit. The fire-pot has a series of concave recesses or pockets f around its upper edge as shown in Figs. 1 and 3.

The annular water-chamber G is a hollow cast-iron ring made somewhat oval in crosssection, tapering toward the top and toward the bottom, except where it is cut away at g in front of the feed-door to allow passage of the fuel. This water-ring G is of as large exterior diameter as can go inside the fire-pot in order to secure as much surface exposure as possible. It has flanges or lugs g which project onto the rim f of the fire-pot and support the water-ring above and out of contact with the fuel unless the fire-pot be filled up higher than is usual or desirable,.the lower tapered portion of the water-ring projecting into the upper part of the fire-pot and the upper tapered portion extending up into the combustion chamber. I desire to get the greatest possible surface exposure of the water-ring to the heated gases with the least possible obstruction, and also to prevent as far as possible the collection of ashes which will gather on a flat surface,- and by reason of their non-conducting character impair the efficiency of the water-ring. For these reasons I make my water ring somewhat tapering in cross-section both toward the top and toward the bottom except where cut away at g as already described. On account of the cutting away at g the section of the ring from which the cutting is taken is extended downward a little lower than the rest of the rings, in order to secure sufficient sectional area for good circulation.

A series of connecting pipes Z, preferably equal in number to the pockets in the rim of the fire-potare connected with the water-ring through the bosses g and lead thence to an upper chamber L whence the hot water is conducted through the flow-pipes M and N to radiators (not shown in the drawings) and back through the return pipes R. The relative size of the several pipes should be such as to se cure proper circulation and is well known in the art. diators.

When the water-ring is placed on its seat there will be a series of open passages from the fire-pot up through the pockets f so that The pipes S lead to additional ranot only will the inner periphery of the waterquickly and to a higher temperature than if the inner periphery of the ring alone were directly exposed to the gases.

I prefer to make the water-ring with a series of concave recesses h in the lower tapered portion of its outer periphery, which come opposite the pockets of the fire-pot, thus increasing the size of the passages.

What I claim as my invention is- 1. A hot-air furnace with hot-air pipes leading to registers and having a fire-pot with a a series of pockets in the upper part of its inner periphery, in combination with an annularwater-chamber as large in diameter aswill go inside the fire-pot, and having projections which rest on the rim of the fire-pot and support the water-ring, a series of connecting pipes leading from the annular water-chamber to an upper chamber, a flow-pipe leading thence to a radiator and a return pipe from the radiator to the annular water-chamber, substantially as described. I

2. A hot-air furnace with hot-air pipes leading to registers and having a fire-pot with a series of pockets in the upper part of its inner periphery, in combination with an annular water-chamber as large in diameter as will go inside the fire-pot, tapered in cross-section toward the top and toward the bottom, and having projections which rest on the rim of the fire-pot and support the annular waterchamber out of contact with the fuel, a series of connecting pipes leadingfrom the annular water-chamber to an upper chamber, a pipe leading thence to a radiator and a return pipe from the radiator to the annular chamber, substantially as described.

I 3. A hot-air furnace with hot-air pipes leading to registers and having a fire-pot with a series of pockets in the upper part of its inner periphery, in combination with an annular water-chamber as large in diameter as will go inside the fire-pot, tapered in cross-section toward the top and toward the bottom, and having projections which rest on the rim of the fire-pot and support the annular waterchamb'er partly within the combustion chamber and partly Within the fire pot, out of contact with the fuel, a series of recesses in the lower portion of the outer periphery opposite the pockets in the fire-pot, a series of connecting pipes leading from the annular waterchamber to an upper chamber, a flow pipe leading thence to a radiator, and a return pipe from the radiator to the annular chamber, substantially as described.

JAMES E. WHITE.

Witnesses:

WILLIAM C. FULLER, WM. A. COPELAND. 

